Joint for steam-conveyer conduits.



J. A. DAVIESS.

10m FOR STEAM CONVEYER cownuns.

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- APPLICATION man FEB. 121 1911. 1 ,278,869. Patented Sept. 17,1918.

M w B ATENT orros.

JAMES A. DAVIE-SS, OF CHICAGO, ILLINOIS, ASSIGNOR TO AMERICAN STEAM CONVEYOR CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

JOINT FOR STEAM-CONVEYER CONDUITS.

1,278,869 Specification of Letters Patent. Patented Sept, 17, 1918,

Application flled February 12, 1917. Serial No. 148,186.

i have their abutting surfaces machined, the

said abutting surfaces receiving their final shape and contour during the process of cast- To all whom it may concern Be it known that I, JAMEs A. DAv1nss, a citizen ofthe United States, residing at Chiveyers, wherein the joined sections need not in the abutting flange when the conduit is cago, in the county of Cook and State of ing the sections. In attaining the object of 5 Illinois, have invented a certain new and my invention I prefer to cast each of the 80 useful Improvement in Joints for Steamsections with attaching flanges having aper- Conveyer Conduits, of which the following tures therein to receive the bolts whereby is a full, clear, concise, and exact descripjuxtaposed sections of the conduit. are fastion, reference being had to the accompany- .tened together. The abutting surfaces of ing drawings, forming a part of this specithe sections including the contiguous faces 65 fication. of connected flanges are cast to present a My invention relatesto airtight andheat and plurality of alternating grooves and ridges. moisture resisting joints and particularly to Before the abutting surfaces of the flanges a form of joint suitable for use in ash conof connected sections are bolted or otherwise veyers of the type wherein steam under drawn together in assembling the conduit 70 pressure is utilized as the medium for carrythe abutting flange faces having the alter-. ing the ashes through the conveyor conduit. nate grooves and ridges before "mentioned The several sections in such a conveyor conare covered with a plastic composition comduit are ordinarily in the form of heavyprising essentially asbestos fiber and Portiron castings bolted together at the place of land cement. The flanges are then drawn 7 installation. tightly together with the result that when Prior to the advent of my invention herethe aforesaid composition ,hardens I have inafter described and claimed the 'matter obtained a joint tha-t is airtight, capable of of preserving the airtight character of steam successfully resisting the action of hot ashes, 2a conveyer conduits has presented a serious steam,-and the mo1sture which invariably 80 problem to engineers engaged in this work; accumulates to a greater or' less extent in a firstly, because of the comparativelygreat steam conveyer conduit. weight of fittings and pipe sections which My invention may be more clearly undergo to make up the conduit; secondly, because stood by referring to the accompanying of the practical impossibility of preventing drawings, wherein, the conduit sections from moving slightly Figure l is a fragmentary sectionalview one with respect to another, and thirdly, beof a steamconveyer conduit, the several cause of the nature of the material passing sections of which are joined together in acthrough the conduit-hot ashes and steam. cordance with the teachings of my present 35 it is a practical impossibility to preserve air-, invention; tight joints between the several sections of ig. 2 is a fragmentary sectional view the conduit 'by the use of gaskets or other illustrating two contiguousflanges in dissimilar means known in the past. Heretoassembled position, clearly to illustrate the fore it has been the practice carefully to alternate grooves and ridges therein, and so machine the abutting or engaging surfaces Fig. 3 is a view similar to Fig. 2 but showof the conduit sections and fittings so that ing the flanges drawn together with the plaswhen the several parts are bolted together a tic composition of asbestos fiber and Portpractically airtight conveyer conduit may be land cement between them. had. Although the joints thus obtained by Similar characters of reference refer to 4b machining the abutting surfaces of the pipe similar parts throughout the several views. 199 sections have been the best heretofore ob- In Fig. 1 I have illustrated a steam containable, these joints have been objectionable veyer conduit comprisin a plurality of cast because of 'the cost of machinin the abutiron sections, A, B and (I, joined together in ting surfaces and the fact that's ight moveaccordance with m invention. Cast inte- 50 ment of the conduit sections one. with regral with the conduit sections are the attach-" spect to another is apt to result ina leak ing flanges D--D arranged to abut one at some point in the conduit. against another as shown. Each of the M invention contemplates aform of-joint flanges D--D is,provided with a plurality particularly suitable for steam jet ash conof apertures which register with apertures no with assembled and which are adapted to receive bolts EE as shown.

Referring now to Fig. 3, it will be seen that the contacting or abutting faces of the flanges DD are cast to present a plurality of alternate grooves and ridges indicated respectively at FF and, G In Fig. 2 the sections are shown ready for assembling. Before the sections are drawn together the grooved or scored faces of the flanges DD are coated with a plastic composition consisting essentially of two-thirds asbestos fi er and one-third Portland cement mixed with water to substantially the consistency of putty. The flanges DD are Portland cement filling the grooves F-F and occupying such spaces as there may be between the abutting flanges. I find that after the aforesaid composition has hardened I have attained a joint that is absolutely airtight and capable of resisting the action of moisture, hot ashes, and steam. Moreover, the joint is slightly flexible, that is, if the connected conduit sect-ions move slightly one with respect to another the composition filling the interstices of the scored flange faces prevents the joint from leaking. characteristics .of my improved joint render it particularly adapted for use in ash conveyer systems" of the steam jet type, and I have therefore described the joint as used in such a system, although I am aware that it may have many other uses.

Having thus described my invention what claim as new and desire to secure by Letters Patent of the United States is:

1. A joint for ash conveyer conduits cornprising a pair of conduit sections provided opposing flanges, a plurality of ridges cast on the face of each of said flanges, means for drawing said flanges one toward the other and a composition of asbestos fiber and Portland cement filling the spaces between said ridges.

. 2. 'A joint of the class described comprismg in combination a pair of conduit sect1ons, opposmg flanges for said sections, a plurality of alternate grooves and ridges formed in the contiguous faces of said anges, means for drawing said flanges one toward the other, and a composition containin asbestos and Portland cement disposed between said flanges and filling said grooves.

3. A joint of the class described comprising in combination a pair of conduit sections,opposing flanges for said sections, a plurality of alternate grooves and ridges formed in the contiguous faces of said flanges, means for drawing said flanges one toward the other, and an initially plastic composition of asbestos andPortland cement disposed between said flanges-and filling said flanges and filling said grooves.

6. A joint of the class described comprising two members having opposing flanges, a plurality of grooves formed in the contiguous faces of said flanges, means for drawing said flanges one toward the other, and a fireproof cementitious fibrous composition between said flanges and filling said grooves.

7. A joint of the class described comprising in combination two members having opposing flanges, means for drawing said flanges one toward the other, one of said flanges 'having a plurality of alternate grooves and ridges therein and a cementit1ous composition including asbestos fiber disposed between said flanges and filling said grooves.

8. A joint of the class ing a pair of members flanges, means for drawing said flanges together, and a packing between said flanges comprising a fibrous material and a cemendescribed comprishaving opposing titious granular material for closing the interstices of the fibrous material.

In witness whereof, my7name this 24th day of January, A. D. 191

, JAMES A. DAVIESS. Witnesses A. G. MoCAnEB, ALBIN O. AHLBERG.

I hereunto subscribe 

